Utility program to simulate a Dart program throwing an unhandled exception, resulting in a Dart crash caught by the C++ Dart VM runner. The program can be run as follows:

$ run fuchsia-pkg://fuchsia.com/crasher_dart#meta/crasher_dart.cmx [<async|sync|exit>]

• async throws an exception from an async function
• sync throws an exception from a sync function
• exit calls the disallowed io::exit() function